Experimental determination of stability constant of ferrous iron borate complex [FeB(OH)4+] at 25 °C from solubility measurements: Implications for transport of iron in reducing environments

The stability constant of FeB(OH)4+ is expected to find applications in many areas of study. For instance, FeB(OH)4+ may have played an important role in transport of ferrous iron in primitive oceans at the surface of the Earth. In the near-field of geological repositories, the formation of FeB(OH)4+ can sequestrate soluble borate, lowering borate concentrations available to the formation of the Am(III)-borate aqueous complex.